In triangle `A B C ,b^2sin2C+c^2sin2B=2bc where b=20 ,c=21 ,` then inradius= (a) 4 (b) 6 (c) 8 (d) 9

In any triangle ABC b^(2)sin2C+c^(2)sin2B=

In triangle ABC, b^(2) sin 2C + c^(2) sin 2B = 2bc where b = 20, c = 21 , then inradius =

lf in DeltaABC,b^(2)sin 2C + c^(2) sin 2B = 2bc,then the triangle is

In a triangle A B C , right angled at B , the inradius is (A B+B C-A C)/2 (b) (A B+A C-B C)/2 (A B+B C+A C)/2 (d) none

In a Delta A B C ,\ ifsin^2A+sin^2B=sin^2C , show that the triangle is right angled.

In triangle A B C , let /_c=pi/2dot If r is the inradius and R is circumradius of the triangle, then 2(r+R) is equal to (a) a+b (b) b+c (c) c+a (d) a+b+c

In triangle A B C , let /_c=pi/2dot If r is the inradius and R is circumradius of the triangle, then 2(r+R) is equal to a+b (b) b+c c+a (d) a+b+c

Prove that in a A B C ,sin^2A+sin^2B+sin^2C<=9/4dot

In any triangle A B C , prove that following: \ \ a^2sin(B-C)=(b^2-c^2)sinA

X Y is drawn parallel to the base B C of Delta A B C cutting A B at X and A C at Y . If A B=4\ B X and Y C=2c m , then A Y= (a) 2c m (b) 4c m (c) 6c m (d) 8c m